28718378 has 16 divisors (see below), whose sum is σ = 46642176. Its totient is φ = 13182960.

The previous prime is 28718353. The next prime is 28718387. The reversal of 28718378 is 87381782.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2075 + ... + 7857.

It is an arithmetic number, because the mean of its divisors is an integer number (2915136).

Almost surely, 2^28718378 is an apocalyptic number.

28718378 is a deficient number, since it is larger than the sum of its proper divisors (17923798).

28718378 is a wasteful number, since it uses less digits than its factorization.

28718378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5989.

The product of its digits is 150528, while the sum is 44.

The square root of 28718378 is about 5358.9530693970. The cubic root of 28718378 is about 306.2339262423.

The spelling of 28718378 in words is "twenty-eight million, seven hundred eighteen thousand, three hundred seventy-eight".